Salary : $59,428.32 - $75,860.88 Annually
Location : Los Angeles County, CA
Job Type: Full time
Job Number: C3856R
Department: PUBLIC WORKS
Opening Date: 08/13/2026
Position/Program InformationEXAM NUMBERC3856R
FILING PERIODThe application filing period will begin on Monday, August 17, 2026, at 8:00 a.m. (PT) - Continuous. We will keep accepting applications until the position is filled. The application window may close unexpectedly once we have enough qualified candidates.
TYPE OF RECRUITMENTWe welcome applications from anyone.
Why work for us? With almost 10 million residents, Los Angeles County is the population county in the nation! As the largest employer in Southern California, with over 100,000 employees in 39 departments and over 2,100 different job descriptions, Los Angeles County offers a lifetime of opportunities and careers. We are Los Angeles County Public Works, the largest municipal public works agency in the nation. With more than 4,000 employees, Public Works offers over 500 different types of career opportunities that promote professional and personal growth as well as a rewarding and exciting work environment!
For more information about the outstanding benefits offered by Los Angeles County, please visit us here:
If you have questions about working for Los Angeles County, including current open recruitments, tips on crafting a resume or acing an interview, career planning, or any other general information, please visit our website at:
ENDORSEMENT OF COUNTY QUALIFICATIONS:If you performed work that differs from the duties described in your class specification and you believe qualifies you for this opportunity, please describe the out-of-class duties in detail in the Work Experience and Supplemental Questions sections of your application.
WITHHOLD INFORMATION:No withhold will be allowed. Required experience/education must be fully met at the time of filing, and clearly indicated on the application.
Essential Job Functions - Fills, lifts, and transports bags of soil, weighing approximately 90 pounds, to the materials lab for analysis.
- Carries PCC (Portland Cement Concrete) cylinders, weighing approximately 30 pounds, to conduct density tests and concrete cylinder strength tests.
- Digs holes 8 inches in diameter and 4 feet deep in firm, dense soil using a manual post-hole digger.
- Performs specialized physical laboratory tests on soils, steel and concrete products, cement, aggregates, asphalts, bituminous mixes, and other engineering construction materials.
- Operates standard testing machines and equipment used in laboratory testing of engineering construction materials.
- Assists in developing new test procedures and modifying and building test apparatus.
- Tests asphalt concrete mixes for design and analysis purposes.
- Performs all calculations required for laboratory and field tests.
- Operates testing and sampling equipment in both the laboratory and the field.
- Performs tensile tests on structural steel.
- Performs complex physical tests on paints and epoxies.
- Performs other duties related to the physical laboratory and field testing of engineering construction materials, as needed.
For more information, please view the classification specification:
Requirements REQUIREMENTS TO QUALIFY:OPTION I: Two years' experience at the level of Engineering Testing Aid II*.
OPTION II:60 semester units or 90 quarter units in an accredited college or university** with specialization in engineering or a physical science***. Applicants may substitute experience for education. Every 18 months of experience conducting physical tests on engineering construction materials may be substituted for 30 semester units or 45 quarter units.
LICENSE: A valid California Class C Driver License or the ability to utilize an alternative method of transportation when needed to carry out job-related essential functions.
PHYSICAL CLASS: Physical Class 4 - Arduous: This class involves frequent heavy lifting over 25 pounds, often combined with bending, twisting, or working above ground on irregular surfaces. It includes those positions that occasionally demand extraordinary physical activity such as those in Safety positions.
SPECIAL REQUIREMENT INFORMATION:*Experience at the level of the County of Los Angeles class of Engineering Testing Aid II is defined as performing standardized physical tests on various engineering construction materials. For a fuller description of work performed refer to County of Los Angeles Class Specifications for
You may still qualify even if your job title is not exactly the same as the one listed. What matters is that your experience is at a similar level - meaning your job involves similar responsibilities, requires comparable skills and knowledge, and takes place within a similar organizational structure. Please provide a clear explanation of your experience to demonstrate that it is at the appropriate level.
**To receive credit for your education, include a legible copy of all relevant official documents, including your transcript from an accredited institution or email it to within five (5) calendar days of application submission. When emailing, please indicate your name, the exam name, and the exam number. The document should show your field of study, the number of units and the type of unit system used (e.g., semester, quarter) and be in English. If not in English, then translation is required. International degrees must be evaluated for equivalency to U.S. standards and indicate the number of units and unit system. Documents marked as unofficial will not be accepted. For more information on our standards for educational documents, please visit:
Note: A printout of a transcript from the school's website is not considered official and will not be accepted. Submitting an unofficial document will result in your application being deemed incomplete and rejected.
We do not accept password-protected documents. Ensure documents are unlocked before attaching to your application or sending to the exam analyst.
***Physical science encompasses any of the sciences, such as physics, chemistry, astronomy, geology, and earth science, that analyze the nature and properties of energy and nonliving matter.
Additional Information Once we have identified that you meet our requirements, an invitation regarding the following assessment process will be sent:
EXAMINATION CONTENT:This examination consists of a Multiple-Choice and Simulation Assessment,
weighted at 100%, measuring:
- Achievement
- Professional Potential
- Responsibility
- Teamwork
- Reading Comprehension
- Numerical Calculation
Candidates must achieve a score of 70% or higher in order to be placed on the eligible register.
STANDARDIZED MULTIPLE-CHOICE TESTS ARE NOT REVIEWABLE BY CANDIDATES PER CIVIL SERVICE RULE 7.19.Notice of Non-Acceptance and Final Result letters will be sent electronically to your email address. Test scores cannot be given over the telephone.
TESTING ACCOMMODATION: If you require an accommodation to fairly compete in any part of the assessment process, you will be given the opportunity to make a request when completing your application. Please note, you may be required to submit documentation from a qualified medical provider or other qualified professional to support your request for a testing accommodation.
TRANSFER OF TEST COMPONENTS:If you have taken identical components recently for other exams, your responses may be automatically transferred to this examination. This exam contains test components that might be used on future exams, and your responses could be transferred to that exam.
TEST PREPARATION:We provide study guides and other test preparation resources to help candidates prepare for employment tests. While the guides may help in preparing for the test, we recommend reviewing all related materials that seem necessary.
- Various information can be found on our website at The section dedicated to test preparation is "Employment Test Assistance."
- Online practice tests are available at
- You can also visit our Los Angeles County Online Assessment Preparation Series webpage at for information about common online assessment types, sample questions, and test-taking tips.
ELIGIBILITY AND VACANCY INFORMATION:Applicants who passed the assessment are placed on a list in the order of their score group for a period of twelve (12) months. Applications will be processed as they are received and added to the list accordingly. We will use this list to fill vacancies in Public Works as they occur.
APPLICATION AND FILING INFORMATION:We only accept applications filed online. Applications submitted by U.S. mail, fax, or in person are not accepted. Apply online by clicking on the "Apply" green button at the top right of this posting. This website can also be used to get application status updates.
Please fill out the application completely. Provide relevant job experience including employer's name and address, job title, beginning and ending dates, number of hours worked per week, and description of work performed.
We may verify information included in the application at any point during the examination and hiring process, including after an appointment has been made. Falsification of information could result in refusal of application or rescission of appointment. Copying verbiage from the Requirements or class specification as your work experience will not be sufficient to demonstrate meeting the requirements. Doing so may result in an incomplete application and may lead to disqualification.
We will send notifications to the email address provided on the application, so it is important that you provide a valid email address. If you choose to unsubscribe or opt out from receiving our emails, it is possible to view notices by logging into governmentjobs.com and checking the profile inbox. It is every applicant's responsibility to take steps to view correspondence, and we will not consider claims of missing notices to be a valid reason for re-scheduling an exam part. Register the below domains as approved senders to prevent email notifications from being filtered as spam/junk mail.
New email addresses need to be verified. This only needs to be done once per email address and can be done at any time by logging in to governmentjobs.com and following the prompts. This is to improve the security of the online application and to prevent incorrectly entered email addresses.
SOCIAL SECURITY NUMBER: Federal law requires that all employed persons have a Social Security Number, so include yours when applying.
COMPUTER AND INTERNET ACCESS AT PUBLIC LIBRARIES: For candidates who may not have regular access to a computer or the internet, applications can be completed on computers at public libraries throughout Los Angeles County.
NO SHARING USER ID, EMAIL AND PASSWORD: All applicants must file their application using their own user ID and password. Using a family member or friend's user ID and password may erase a candidate's original application record.
ANTI-RACISM, DIVERSITY, AND INCLUSION (ARDI): The County of Los Angeles recognizes and affirms that all people are created equal and are entitled to all rights afforded by the Constitution of the United States. We are committed to promoting Anti-racism, Diversity, and Inclusion efforts to address the inequalities and disparities amongst race. We support the ARDI Strategic Plan and its goals by improving equality, diversity, and inclusion in recruitment, selection, and employment practices.
CONTACT INFORMATION:Department Contact Name: Mayra Fuentes
Department Contact Phone: Department Contact Email: ADA Coordinator Phone: Teletype Phone: California Relay Services: COUNTY OF LOS ANGELES Employment InformationAny language contained in the job posting supersedes any language contained below.This document is intended to provide general information about the recruitment process of the County of Los Angeles. Applicants with questions about a specific job posting should contact the exam analyst listed on the posting.
Equal Employment Opportunity/Non-Discrimination Statement:The County of Los Angeles is an Equal Employment Opportunity Employer and is committed to non-discrimination in the County workforce, regardless of age (40 and over); ancestry; color; ethnicity; religious creed; protected family or medical leave status; disability; marital status; medical condition; genetic information; military and veteran status; national origin; race ; sex; gender; sexual orientation; or any other characteristic protected by State or federal law. For more information, please visit:
Testing Accommodations for Applicants:The County of Los Angeles complies with all federal and state disability laws and makes reasonable accommodations for qualified applicants and employees with disabilities. If a reasonable accommodation is needed to participate in the job application process, please contact the testing accommodation coordinator listed on the job posting. Hearing impaired applicants with telephone teletype equipment may leave messages by calling the teletype phone number on the job posting. For more information on accommodations, please visit:
Fair Chance:The County of Los Angeles is a Fair Chance employer. Except as otherwise permissible under applicable laws, you will not be asked to provide information about conviction history unless you receive a conditional offer of employment. The County will make an individualized assessment of whether your conviction history has a direct and adverse relationship with the specific duties of the job, and will also consider potential mitigating factors, which may include, but is not limited to, evidence and extent of rehabilitation, recency of the offense(s), and age at the time of the offense(s). If asked to provide information about conviction history, any convictions or court records which are exempted by a valid court order do not have to be disclosed. Qualified applicants with arrest or conviction records will be considered for employment in accordance with County Fair Chance Policies and the Fair Chance Act (Gov. Code Section 12952).
Employment Eligibility:Final appointment is contingent upon verification of U.S. citizenship or the right to work in the United States.
Career PathFinder:Resources to help current and prospective employees plan a career with Los Angeles County are available. To explore career paths to and from nearly all job titles, please visit our interactive Career PathFinder application at
Veteran's Credit:Pursuant to the County Charter and County policy, in all open competitive examinations (i.e., examinations open to everyone), the County of Los Angeles will add a credit of 10 percent of the total credits specified for such examination to the final passing score of an honorably discharged veteran, as well as the spouse of a deceased or disabled veteran, who served in the Armed Forces of the United States under specific conditions.
For more information on veteran's credit, please visit:
Revised September 2025
For detailed information, please click
01
NOTIFICATIONS AND CORRESPONDENCE ACKNOWLEDGEMENTAll important exam notifications including result letters, and notices of non-acceptance will be sent electronically to the email address provided on the application. It is important that you provide a valid email address. DO NOT select "off" under Email Preferences within your profile or click "unsubscribe" on our notices, if you would like the County of Los Angeles to notify you regarding your application status, test schedules, and other important information pertaining to your candidacy for this position.
Please add , , , , , , and to your list of approved senders to prevent email notifications from being filtered as spam/junk/clutter mail.
Applicants have the ability to opt out of emails from Los Angeles County. It is your responsibility to take the above steps to view correspondence. If you unsubscribe, you will NOT receive email notifications for any examination for which you apply with Los Angeles County.
Los Angeles County will not consider claims of not viewing or receiving notification to be a valid reason for late test administration or rescheduling of a test component. If you choose to unsubscribe, you can check for notifications by logging into governmentjobs.com to view your profile inbox. Exam scores cannot be disclosed over the phone.
- I understand the above information and instructions.
02
SUPPLEMENTAL QUESTIONNAIRE INSTRUCTIONSThe information you provide on this supplemental questionnaire will be evaluated and used to determine your eligibility to participate in the next phase of the examination process. Check your answers carefully. Any mistakes or incomplete responses may result in the disqualification of your application, even if you possess the required experience or education. Be as specific as possible and provide all information requested. Statements such as "see resume" or "see application" will not be accepted. All information is subject to verification at any time during the examination and hiring process. Providing false information may result in disqualification or dismissal.
Your responses to the supplemental questionnaire do not replace the requirement to complete the Work Experience section of your application. You must still complete that section in full. For each job or position held, you must provide the employer's name and address, your job title, beginning and ending dates, number of hours worked per week, and a detailed description of duties performed. Positions or experience that are grouped together will not be accepted; each position and the experience gained must be listed separately. If you are a Los Angeles County employee who has held multiple positions,
do not list all of your time with the County under your current payroll title.
- I understand the above information and instructions.
03
ENDORSEMENT OF COUNTY QUALIFICATIONS:If you performed work that differs from the duties described in your class specification and you believe qualifies you for this opportunity, please describe the out-of-class duties in detail in the Work Experience and Supplemental Questions sections of your application.
- I understand the above information and instructions.
04
REQUIREMENTS TO QUALIFY:Which of the following best describes your qualifications for this examination?
OPTION I: Two years' experience at the level of Engineering Testing Aid II*.
OPTION II:60 semester units or 90 quarter units in an accredited college or university** with specialization in engineering or a physical science***. Applicants may substitute experience for education. Every 18 months of experience conducting physical tests on engineering construction materials may be substituted for 30 semester units or 45 quarter units.
- OPTION I
- OPTION II
- I do not meet any of the above requirements.
05
OPTION I REQUIREMENTS:How many years of experience do you possess at the level of
Engineering Testing Aid II*?
*Experience at the level of the County of Los Angeles class of Engineering Testing Aid II is defined as performing standardized physical tests on various engineering construction materials. For a fuller description of work performed refer to County of Los Angeles Class Specifications for
You may still qualify even if your job title is not exactly the same as the one listed. What matters is that your experience is at a similar level - meaning your job involves similar responsibilities, requires comparable skills and knowledge, and takes place within a similar organizational structure. Please provide a clear explanation of your experience to demonstrate that it is at the appropriate level.
- Less than 1 year
- 1 year to less than 2 years
- 2 years or more
- Not Applicable
06
If you indicated you have experience for Question #5, please describe your experience at the level of Engineering Testing Aid II.
For each experience, please indicate the following information:
- Position Title
- If your position title is not consistent with your duties, describe the out-of-class duties in detail in the Work Experience and Supplemental Questions as stated in the job bulletin under Endorsement of County Qualifications.
- Employer
- Immediate Supervisor name(s) and phone number
- Approximate dates of your experiences From (mm/yr) - To (mm/yr)
- Number of hours worked per week
- Indicate the types of physical tests you have conducted on engineering construction materials.
- Describe duties in detail.If you do not have any experience under this option, please write "DOES NOT APPLY."
NOTE:Comments such as "see resume or application" will not be considered as a response.
You will not receive credit for your response if you have missing requested information.
Please ensure the experience you claim is consistent with the experience section listed on your application.
07
OPTION II REQUIREMENTS:
Please indicate the number of semester or quarter units you have completed from an accredited college or university** with a specialization in engineering or a physical science***.
The semester or quarter units you have completed or earned must be reflected on your
official transcript.
**To receive credit for your education, include a legible copy of all relevant official documents, including your transcript from an accredited institution or email it to within five (5) calendar days of application submission. When emailing, please indicate your name, the exam name, and the exam number. The document should show your field of study, the number of units and the type of unit system used (e.g., semester, quarter) and be in English. If not in English, then translation is required. International degrees must be evaluated for equivalency to U.S. standards and indicate the number of units and unit system. Documents marked as unofficial will not be accepted. For more information on our standards for educational documents, please visit:
We do not accept password-protected documents. Ensure documents are unlocked before attaching to your application or sending to the exam analyst.
***Physical science encompasses any of the sciences, such as physics, chemistry, astronomy, geology, and earth science that analyze the nature and properties of energy and nonliving matter.
- Fewer than 30 semester units or 45 quarter units
- 30 semester units or 45 quarter units
- 60 semester units or 90 quarter units
- More than 60 semester units or 90 quarter units
- Not Applicable
08
If you answered yes to Question #7, please indicate the field of study, number of units completed, and the educational institution where you completed the coursework.
- Specialization:
- Semester Units / Quarter Units Completed (Please INDICATE semester units or quarter units):
- Official Document Date:
- College or University Name:
Example:
Civil Engineering
60.0 Semester Units
05/20/2026
Los Angeles City College (LACC)
If you have not completed any coursework at an accredited college or university with a specialization in engineering or physical science, please write
"DOES NOT APPLY".
09
OPTION II SUPPORTING DOCUMENTATION: To qualify, you must attach official documents at the time of filing, or submit them within five (5) calendar days of filing your application to
Note: A printout of a transcript from the school's website is not considered official and will not be accepted. Submitting an unofficial document will result in your application being deemed incomplete and rejected.
How will you submit your supporting official document(s)?
- I will upload the official document(s) at the time of application submission.
- I will email the official document(s) to within five (5) calendar days of submitting my application.
- Not Applicable
10
OPTION II REQUIREMENTS: Experience may be substituted for education. Every eighteen (18) months of conducting physical tests on engineering construction materials may be substituted for 30 semester units or 45 quarter units.
Please indicate your total months of experience.
If you do not have any experience, please select "Not Applicable".
- Less than 18 months
- 18 months to 35 months
- 36 months to 53 months
- 54 months or more
- Not Applicable
11
If you indicated you have experience for Question #10, please describe your experience conducting physical tests of engineering construction materials in the box below.
For each experience, please indicate the following information:
- Position Title
- Employer
- Immediate Supervisor name(s) and phone number
- Approximate dates of your experiences From (mm/yr) - To (mm/yr)
- Number of hours worked per week
- Indicate the types of physical tests you have conducted on engineering construction materials.
- Describe duties in detail.
If you do not have any experience under this option, please write "DOES NOT APPLY."
NOTE:Comments such as "see resume or application" will not be considered as a response.
You will not receive credit for your response if you have missing requested information.
Please ensure the experience you claim is consistent with the experience section listed on your application.
Required Question
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